Blast-nozzle.



E. B. CORNELL & D. TOWNSEND.

BLAST NOZZLE.

APPLICATION FILED NOV. 1, 1907.

1 123 992, Patented Jan.5,1915.

3 SHEETSBHEBT 2.

FIGH

WITNES ES: INVENTORS: fluflflfifglwwwm 0/4500 TOW/535M,

E. B. CORNELL &: D. TOWNSEND.

BLAST NOZZLE.

APPLIOATION FILED NOV. 1, 1907.

1,123,992.. Patented Jan.5,1915.

3 SHEETS-SHEET 3.

' THE NORRIS PETERS 60., PHOTOYLITHQ, WASHINGTON, D. C

ELIJ'AI'I BEANS CORNELL AND DAVID TOWNSEND, OF PHILADELPHIA, PENNSYLVANIA.

BLAST-NOZZLE.

Application filed November 1, 1907.

To all whom it may concern:

Be it known that we, ELIJAH BEANS Con- NELL and DAVID Towxsnxn, citizens of the United States, residing at Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Blast-Nozzles, whereof the following is a specification, reference being had. to the accompanying drawings.

Our improvement relates to devices whereby a fluid may be injected above a fire in a furnace, in a sheet coextensive with the furnace chamber, from the front wall to the bridge wall, so that the smoke arising from the fire is forcibly mixed and consumed with the injected gas.

Our improvement relates particularly to that blast nozzle through which the fluid is supplied to the furnace, as hereinafter described, and it is an object of our invention to provide a device which may be readily applied to existing furnaces and variably adjusted to direct the injected fluid at a proper angle with respect to the bridge wall.

In the accompanying drawings; Figure I, is a vertical sectional view of a boiler furnace, showing a convenient embodiment of our invention applied thereto. Fig. II, is a fragmentary sectional view taken on the line II, II, in Fig. I. Fig. III, is a horizontal sectional view of one of the nozzles shown in Fig. I, taken on the line III, III, in Fig. IV. Fig. IV, is a vertical sectional view of said nozzle, taken on the line IV, IV, in Fig. III. Fig. V, is a horizontal sec tional view similar to Fig. III, but showing a modified form of nozzle, section being taken on the line V, V, in Fig. VI. Fig. VI, is a vertical sectional view of said nozzle, taken on the line VI, VI, in Fig. V, and showing the range of adjustment of the nozzle in its recess in the supporting wall.

In Fig. I, the boiler 1, is mounted in operative relation with a furnace comprising the front wall 2, bridge wall 3, and grate 4. Said front wall 2, comprises recesses 5, in which are fitted the nozzles 6, which are each of the same length and thickness as an ordinary brick, so as to occupy a recess 5, formed by omitting or removing a brick from the furnace wall.

It may be observed that the aforesaid construction and arrangement of the nozzles 6, as ordinary bricks, not only facilitates the application of the invention to furnaces in the course of erection, but mini- Specification of Letters Patent.

Patented. Jan. 5, 1915.

Serial No. 400,225.

mizes the alterations which are necessary to apply the invention to existing furnaces. Said nozzles have inlets 7, and are supplied with a fluid which is directed through the branch pipes 8, respectively controlled by valves 9, and is injected into the furnace chamber through jet orifices in the edge of said nozzles 6, overhanging the grate I, so as to deliver the fluid in a common plane ex tending from side to side of the furnace chamber and from the front wall 2, to the bridgewall 3, as indicated by the line 12, in Fig. I; the direction and force of delivery of said fluid being such that it impinges upon the bridge wall so far from the top of the latter as to prevent the escape of the smoke l i, arising from the coal 15, on said grate 4, until said smoke is so mixed with the injected fluid as to be consumed before its discharge from the furnace.

As shown in Figs. III and IV, the nozzle 6, comprises a rectangular body portion of the same length. and thickness as an ordinary brick, and having opposite parallel plane walls merging into opposite converging plane walls which are rounded at their junction; the front and back edges of the nozzle being parallel, but said front edge being rounded at its opposite ends. Said nozzle is provided at the junction of the converging walls with a series of jet orifices 20, whose axes are in parallel relation with each other and in parallel relation with the upper inclined face 2-1, of the nozzle. Said nozzle also comprises at the respectively opposite ends of the series of parallel orifices 20, orifices 23, which are in oblique relation to said orifices 20, in radial relation with the center of curvature of the ends of the nozzle, and in parallel relation with the upper inclined face 21, thereof. Said orifices 20, and 23, are disposed in parallel relation with the upper inclined wall 21, of the nozzle, to facilitate the making of said orifices by drilling operations, with said wall 21, maintained in contact with a plane face on the drilling table.

The described parallel and radial relation of the respective orifices 20 and 23, is such as to direct the fluid therethrough in a substantially plane sheet which is laterally wider than the nozzle. As shown in Fig. II, the adjoining nozzles are supported in such correlation that the end jets of fluid form adjoining nozzles decussate as indicated by the lines 25, and all of the fluid is thus in jected in a common plane and forms a continuous sheet covering the .fire and preventing the escape of any smoke. v

As shown in Figs. III and IV, the orifices 20, and 23, are of greater transverse extent at their discharge ends than at their inner ends, such construction facilitating the distribution of the fiuid as above described. Although said jet orifices are conveniently formed circular in cross section by drilling and reaming operations, it is to be noted that they may be otherwise formed, for instance, as shown in Figs. V and VI, the orifices 28, and 29, extend respectively in parallel and oblique relation with each other, and are of greater extent at their outer than at their inner ends, like the orifices 20, and 23, but are slots of greater horizontal than vertical extent, conveniently formed by saw cuts in the nozzle extending parallel with the upper inclined wall thereof.

, As shown in Figs. I and VI, the nozzles being of the thickness of an ordinary brick, are loosely fitted in recesses 5, in the furnace wall 2, which equal the thickness of a brick plus the thickness of mortar upon opposite sides thereof, and, consequently, said nozzles may be variably tilted in their recesses, to the extent indicated by the dash lines 31, so as to vary the angular direction of the fluid jets indicated by the dot and dash lines 32, in accordance with the relative position of the nozzle recesses in the furnace wall 2, and the height of the bridge wall 3. It is to be understood that when the nozzles are properly adjusted upon the supporting wall 2, as above described, they may be rigidly secured in adjusted position by cement 83, insaid recesses 5. x

We do not desire to limit ourselves to the precise details of construction herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of our invention as defined in the appended claims.

We claim a I I 1. The combination with a nozzle support; of a plurality of nozzles each having rounded front corners connected by a rounded front portion extending straight between said corners; a plurality of parallel jet orifices opening through said straight portion; a plurality of jet orifices opening through said rounded corners in oblique relation to the other orifices; and means retaining said nozzles on said support in such relation that the fluid delivered from the corner orifices of adjacent nozzles is mixed.

2. A nozzle comprising opposite converging walls at its outlet end, and a series of jet orifices extending in parallel relation with one of said walls and in oblique relation to the other of said walls; said orifices being slots of greater extent at their outer ends than at their inner ends, and of greater horizontal than vertical extent.

3. A blast nozzle having its posterior portion of the dimensions of a brick and adapted to be set as a brick in a furnace Wall: 7

said posterior portion having parallel top and bottom walls, a rear wall at right angles to said top and bottom walls, and end walls at right angles to said other walls; said nozzle having a fluid inlet at the back thereof communicating with a cavity in said nozzle having opposite parallel end walls and for wardly converging top and bottom walls, whereby the cross sectional area of said cavity is progressively diminished toward the front thereof; said nozzle having rounded front corners connected by a rounded front portion extending straight between said corners; a plurality of jet orifices extending through said straight portion in parallel relation with each other and with said end walls, but inclined downwardly toward the front thereof with respect to said top and bottom walls; a plurality of jet orifices opening through said rounded corners in oblique relation to the other orifices all of said orifices being larger at their outer ends than at their inner ends.

In testimony whereof we have hereunto signed our names at Philadelphia, Pennsylvania, this thirtieth day of October, 1907.

ELIJAH BEANS CORNELL.

DAVID TOIVNSEN D. Witnesses ARNOLD KATZ, ARTHUR E. PAIGE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

